1 /* GStreamer
2 *
3 * Copyright (C) 2007 Rene Stadler <mail@renestadler.de>
4 * Copyright (C) 2007-2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
15 *
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
20 */
21
22 /**
23 * SECTION:element-giostreamsrc
24 * @title: giostreamsrc
25 *
26 * This plugin reads data from a custom GIO #GInputStream.
27 *
28 * It can, for example, be used to read data from memory with a
29 * #GMemoryInputStream or to read from a file with a
30 * #GFileInputStream.
31 *
32 * ## Example code
33 *
34 * The following example reads data from a #GMemoryInputStream.
35 * |[
36
37 #include <gst/gst.h>
38 #include <gio/gio.h>
39
40 ...
41
42 GstElement *src;
43 GMemoryInputStream *stream;
44 // in_data will contain the data to send
45 guint8 *in_data;
46 gint i;
47
48 ...
49 in_data = g_new (guint8, 512);
50 for (i = 0; i < 512; i++)
51 in_data[i] = i % 256;
52
53 stream = G_MEMORY_INPUT_STREAM (g_memory_input_stream_new_from_data (in_data, 512,
54 (GDestroyNotify) g_free));
55 src = gst_element_factory_make ("giostreamsrc", "src");
56 g_object_set (G_OBJECT (src), "stream", stream, NULL);
57
58 ...
59
60 * ]|
61 *
62 */
63
64 #ifdef HAVE_CONFIG_H
65 #include <config.h>
66 #endif
67
68 #include "gstgiostreamsrc.h"
69 #include "gstgioelements.h"
70
71 GST_DEBUG_CATEGORY_STATIC (gst_gio_stream_src_debug);
72 #define GST_CAT_DEFAULT gst_gio_stream_src_debug
73
74 enum
75 {
76 PROP_0,
77 PROP_STREAM
78 };
79
80 #define gst_gio_stream_src_parent_class parent_class
81 G_DEFINE_TYPE (GstGioStreamSrc, gst_gio_stream_src, GST_TYPE_GIO_BASE_SRC);
82 GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (giostreamsrc, "giostreamsrc",
83 GST_RANK_NONE, GST_TYPE_GIO_STREAM_SRC, gio_element_init (plugin));
84
85 static void gst_gio_stream_src_finalize (GObject * object);
86 static void gst_gio_stream_src_set_property (GObject * object, guint prop_id,
87 const GValue * value, GParamSpec * pspec);
88 static void gst_gio_stream_src_get_property (GObject * object, guint prop_id,
89 GValue * value, GParamSpec * pspec);
90 static GInputStream *gst_gio_stream_src_get_stream (GstGioBaseSrc * bsrc);
91
92 static void
gst_gio_stream_src_class_init(GstGioStreamSrcClass * klass)93 gst_gio_stream_src_class_init (GstGioStreamSrcClass * klass)
94 {
95 GObjectClass *gobject_class = (GObjectClass *) klass;
96 GstElementClass *gstelement_class = (GstElementClass *) klass;
97 GstGioBaseSrcClass *gstgiobasesrc_class = (GstGioBaseSrcClass *) klass;
98
99 GST_DEBUG_CATEGORY_INIT (gst_gio_stream_src_debug, "gio_stream_src", 0,
100 "GIO source");
101
102 gobject_class->finalize = gst_gio_stream_src_finalize;
103 gobject_class->set_property = gst_gio_stream_src_set_property;
104 gobject_class->get_property = gst_gio_stream_src_get_property;
105
106 g_object_class_install_property (gobject_class, PROP_STREAM,
107 g_param_spec_object ("stream", "Stream", "Stream to read from",
108 G_TYPE_INPUT_STREAM, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
109
110 gst_element_class_set_static_metadata (gstelement_class, "GIO stream source",
111 "Source",
112 "Read from any GIO stream",
113 "Sebastian Dröge <sebastian.droege@collabora.co.uk>");
114
115 gstgiobasesrc_class->get_stream =
116 GST_DEBUG_FUNCPTR (gst_gio_stream_src_get_stream);
117 }
118
119 static void
gst_gio_stream_src_init(GstGioStreamSrc * src)120 gst_gio_stream_src_init (GstGioStreamSrc * src)
121 {
122 }
123
124 static void
gst_gio_stream_src_finalize(GObject * object)125 gst_gio_stream_src_finalize (GObject * object)
126 {
127 GstGioStreamSrc *src = GST_GIO_STREAM_SRC (object);
128
129 if (src->stream) {
130 g_object_unref (src->stream);
131 src->stream = NULL;
132 }
133
134 GST_CALL_PARENT (G_OBJECT_CLASS, finalize, (object));
135 }
136
137 static void
gst_gio_stream_src_set_property(GObject * object,guint prop_id,const GValue * value,GParamSpec * pspec)138 gst_gio_stream_src_set_property (GObject * object, guint prop_id,
139 const GValue * value, GParamSpec * pspec)
140 {
141 GstGioStreamSrc *src = GST_GIO_STREAM_SRC (object);
142
143 switch (prop_id) {
144 case PROP_STREAM:{
145 GObject *stream;
146
147 if (GST_STATE (src) == GST_STATE_PLAYING ||
148 GST_STATE (src) == GST_STATE_PAUSED) {
149 GST_WARNING
150 ("Setting a new stream not supported in PLAYING or PAUSED state");
151 break;
152 }
153
154 stream = g_value_dup_object (value);
155 if (src->stream)
156 g_object_unref (src->stream);
157 src->stream = G_INPUT_STREAM (stream);
158 break;
159 }
160 default:
161 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
162 break;
163 }
164 }
165
166 static void
gst_gio_stream_src_get_property(GObject * object,guint prop_id,GValue * value,GParamSpec * pspec)167 gst_gio_stream_src_get_property (GObject * object, guint prop_id,
168 GValue * value, GParamSpec * pspec)
169 {
170 GstGioStreamSrc *src = GST_GIO_STREAM_SRC (object);
171
172 switch (prop_id) {
173 case PROP_STREAM:
174 g_value_set_object (value, src->stream);
175 break;
176 default:
177 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
178 break;
179 }
180 }
181
182 static GInputStream *
gst_gio_stream_src_get_stream(GstGioBaseSrc * bsrc)183 gst_gio_stream_src_get_stream (GstGioBaseSrc * bsrc)
184 {
185 GstGioStreamSrc *src = GST_GIO_STREAM_SRC (bsrc);
186
187 return (src->stream) ? g_object_ref (src->stream) : NULL;
188 }
189